Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 33534

GRB 230328B: Nanshan/NEXT optical upper limit
2023-03-29T03:45:19Z (a year ago)
Dong Xu at NAOC/CAS <>
T.H. Lu, S.Q. Jiang, S.Y. Fu, X. Liu (NAOC), Z.P. Zhu (NAOC, HUST), D. 
Xu (NAOC), X. Gao (Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:

We observed the field of GRB 230328B detected by Swift (Gropp et al., 
GCN 33527),using the NEXT-0.6m optical telescope located at Nanshan, 
Xinjiang, China. Observations started at 16:39:57 UT on 2023-03-28, 
i.e., 1.75 hr after the Swift/BAT trigger.

The previously reported optical afterglow (e.g., Pankov et al., GCN 
33528; Belkin et al., GCN 33530) is marginally detected in our stacked 
image. Preliminary photometry of the afterglow has r ~ 19.1 mag, 
calibrated by nearby PanSTARRS stars.
Looking for U.S. government information and services? Visit